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Haplentactinia armillata
Taxonomy
Haplentactinia armillata was named by Nazarov, in Nazarov and Popov (1980). It is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1980 | Haplentactinia armillata Nazarov, in Nazarov and Popov p. 55 figs. pl. 6, figs. 1, 2 |
| 2008 | Haplentactinia armillata Maletz and Bruton p. 1189 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Haplentactinia armillata Nazarov, in Nazarov and Popov 1980
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Maletz and D. L. Bruton 2008 | The species may possess a small microsphere of ca.
55–60 lm in diameter (Text-fig. 5G, H), but as the only specimen showing this feature is incomplete, the detailed structure is unclear. The specimen, however, shows a part of a branched structure at the base of two distally branched spines, here interpreted as the outer spines of Haplentactinia(?) armillata. A branched outer spine is also present in a specimen with a coarse three-dimensional mesh, measuring ca. 150 lm in diameter (Text-fig. 5I). The outer spines are generally between 100 and 150 lm long, with a stout base, slowly tapering towards their branching point. The secondary spines of these branches are up to 100 lm long, but in most specimens they are distinctly shorter, generally 50–60 lm long. They have a maximum diameter of 10 lm. The coarse mesh has an opening width of 20–25 lm with the bars attaining a diameter of 5–6 lm. The mesh appears to get finer and denser distally, but all specimens are either small or incompletely preserved. |